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SARA-R4 series-AT commands manual
UBX-17003787 - R16
17File System
Page 196 of 401
17File System
17.1File tags
17.1.1Description
File system commands have the optional <tag> parameter that allows the user to specify a file type when a
file system AT command is issued, to inform the system what to do with it. Application specific files must be
saved with the correct type tag, otherwise they are treated as common user files.
The file tag applicability depends on the module series: see Table 17 for the allowed tags supported by the
interested product. An overview about each file tag is provided in Table 18.
Module
"USER"
"FOAT"
"AUDIO"
"ECALL_EXT"
"FOTA_EXT"
"AUDIO_EXT"
"PROFILE"
"GNSS"
"CALLSRV_EXT"
"XLWM2M"
SARA-R4 * * * *
6
SARA-R404M / SARA-R410M-01B * * *
SARA-N4 * * *
Table 17: Tag applicabilities to module series
Tag Name Specification
"USER" User file system This is the default type if the <tag> parameter is omitted in file system AT
commands. All generic files can be stored in this manner.
Example: AT+UDWNFILE="foobar",25,"USER" is the same as AT
+UDWNFILE="foobar",25
"FOAT" FOAT file system This tag is used to specify the file type as a firmware update package. It will
place the firmware update package in the proper file cache to be used later by
the +UFWINSTALL command.
"AUDIO" Audio parameters This tag is used to store audio calibration file "audio_gain_calibration<X>.xml"
and "voice<X>.nvm" in the selected profile <X>=0,1. The profile is stored into
NVM by using ATZ<X>.
The "audio_gain_calibration<X>.xml" and "voice<X>.nvm" files can be over-
written with AT&W<X> command.
"ECALL_EXT" eCall controller
configuration
and custom eCall
prompts
This tag is used to read, download and delete the eCall controller configuration
(see the eCall implementation in u-blox cellular modules application note [180])
or download and delete custom eCall prompts (see the eCall Prompts section).
Reading and downloading commands use a dedicated channel of the USB CDC-
ACM interface.
To download the eCall controller configuration or custom eCall prompts in the
module, use the +UDWNFILE command.
To read the eCall controller configuration from the module, use the +URDFILE
command.
To delete eCall controller configuration or custom eCall prompts from the
module, use the +UDELFILE command.
"FOTA_EXT" Firmware for FOTA
procedure
This tag has to be used to store the firmware file for the FOTA procedure using
a dedicated channel of the USB CDC-ACM interface.
"AUDIO_EXT" Audio configuration This tag is used to read or download audio configuration (see Audio parameters
tuning section). The audio configuration file includes the NVM settings of the
following AT commands (where applicable):
• +CLVL AT command
6
Not supported by SARA-R410M-02B-00, SARA-R410M-02B-01, SARA-R410M-52B-00, SARA-R410M-
52B-01, SARA-R412M-02B-00 and SARA-R412M-02B-01